The opening Naxos track (Allegro K14)
[listen -- track 1, 0:01-0:59]
is characteristically carefree, even skittish -- its 2nd movement a menuetto, a form favoured by the child composer. It's only in K12 and K15, the two-movement sonatas, that Mozart drops the menuetto in favour of a Andante-Allegro pattern. Not until the menuetto primo (K10) is there a fleeting pre-echo of Mozart in his miraculous twenties. Another whisper is heard in an opening andante (K11). The architectural artistry of Allegro (K13) coming from a 21st century conservatory student would surely be greeted with tears of joy. Moreover the menuetto (also K13) is surprisingly novel in its conception
[listen -- track 14, 0:01-0:33].

If your heart is set on having all six sonatas (together) and at budget price, look no further. Alternatively -- Mozart lovers who'd settle for three sonatas -- K13, 14 and 15 -- should consider the budget Regis Records versions coupled with the two flute concertos: No 1 in G, K313 and No 2 in D, K314. In this case persuasive Australian-born flutist Judith Hall and Juilliard's Susan Alexander-Max (on an Erard pianoforte, circa 1846) yield nothing to Wincenc and Raps, and Hall is backed by the Philharmonia Orchestra in radiant concerto performances.